feat: Add indicator code verification API and UI

- Add POST /api/indicator/verifyCode endpoint in Python backend.
- Update IndicatorEditor.vue with Verify Code button and error modal.
- Add i18n support for verification UI.
- Update README files.

quantdinger_vue/src/locales/lang/en-US.js

@@ -621,6 +621,10 @@ const locale = {
   'dashboard.indicator.editor.aiPromptRequired': 'Please enter your idea',
   'dashboard.indicator.editor.aiGenerateSuccess': 'Code generated successfully',
   'dashboard.indicator.editor.aiGenerateError': 'Code generation failed, please try again later',
+  'dashboard.indicator.editor.verifyCode': 'Verify Code',
+  'dashboard.indicator.editor.verifyCodeSuccess': 'Verification Passed',
+  'dashboard.indicator.editor.verifyCodeFailed': 'Verification Failed',
+  'dashboard.indicator.editor.verifyCodeEmpty': 'Code cannot be empty',
   'dashboard.indicator.guide.title': 'Python Indicator & Strategy Development Guide',
   'dashboard.indicator.guide.intro': 'This platform supports writing custom technical indicators and trading signals using Python. The system includes built-in pandas and numpy data analysis libraries. You can use standard DataFrame operations to process K-line data and draw charts or mark buy/sell signals.',
   'dashboard.indicator.guide.section1.title': '1. Runtime Environment & Predefined Variables',

quantdinger_vue/src/locales/lang/ja-JP.js

@@ -617,6 +617,10 @@ const locale = {
   'dashboard.indicator.editor.aiPromptRequired': 'あなたの考えを入力してください',
   'dashboard.indicator.editor.aiGenerateSuccess': 'コード生成が成功しました',
   'dashboard.indicator.editor.aiGenerateError': 'コード生成に失敗しました。後でもう一度お試しください。',
+  'dashboard.indicator.editor.verifyCode': 'コード検証',
+  'dashboard.indicator.editor.verifyCodeSuccess': '検証合格',
+  'dashboard.indicator.editor.verifyCodeFailed': '検証失敗',
+  'dashboard.indicator.editor.verifyCodeEmpty': 'コードは空にできません',
   'dashboard.indicator.backtest.title': 'インジケーターのバックテスト',
   'dashboard.indicator.backtest.config': 'バックテストパラメータ',
   'dashboard.indicator.backtest.startDate': '開始日',

quantdinger_vue/src/locales/lang/ko-KR.js

@@ -616,6 +616,10 @@ const locale = {
   'dashboard.indicator.editor.aiPromptRequired': '당신의 생각을 입력해주세요',
   'dashboard.indicator.editor.aiGenerateSuccess': '코드 생성 성공',
   'dashboard.indicator.editor.aiGenerateError': '코드 생성에 실패했습니다. 나중에 다시 시도해 주세요.',
+  'dashboard.indicator.editor.verifyCode': '코드 검증',
+  'dashboard.indicator.editor.verifyCodeSuccess': '검증 통과',
+  'dashboard.indicator.editor.verifyCodeFailed': '검증 실패',
+  'dashboard.indicator.editor.verifyCodeEmpty': '코드는 비워둘 수 없습니다',
   'dashboard.indicator.backtest.title': '지표 백테스트',
   'dashboard.indicator.backtest.config': '백테스트 매개변수',
   'dashboard.indicator.backtest.startDate': '시작일',

quantdinger_vue/src/locales/lang/zh-CN.js

@@ -618,6 +618,10 @@ const locale = {
 'dashboard.indicator.editor.aiPromptRequired': '请输入您的想法',
 'dashboard.indicator.editor.aiGenerateSuccess': '代码生成成功',
 'dashboard.indicator.editor.aiGenerateError': '代码生成失败，请稍后重试',
+'dashboard.indicator.editor.verifyCode': '代码检查',
+'dashboard.indicator.editor.verifyCodeSuccess': '代码检查通过',
+'dashboard.indicator.editor.verifyCodeFailed': '代码检查未通过',
+'dashboard.indicator.editor.verifyCodeEmpty': '代码不能为空',
 'dashboard.indicator.boundary.message': '提示：指标脚本只负责“计算 + 绘图 + buy/sell 信号”；仓位、风控、加减仓、手续费/滑点属于策略执行配置。',
 'dashboard.indicator.boundary.indicatorRule': "指标脚本请只输出 buy/sell（并设定 df['buy']/df['sell']）。不要在脚本内撰写仓位管理、止盈止损、加减仓。",
 'dashboard.indicator.boundary.backtestRule': '规则：同一根K线若出现主信号（buy/sell→开/平仓/反手），本K线将跳过所有加仓与减仓。',

quantdinger_vue/src/locales/lang/zh-TW.js

@@ -618,6 +618,10 @@ const locale = {
   'dashboard.indicator.editor.aiPromptRequired': '請輸入您的想法',
   'dashboard.indicator.editor.aiGenerateSuccess': '代碼生成成功',
   'dashboard.indicator.editor.aiGenerateError': '代碼生成失敗，請稍後重試',
+  'dashboard.indicator.editor.verifyCode': '代碼檢查',
+  'dashboard.indicator.editor.verifyCodeSuccess': '代碼檢查通過',
+  'dashboard.indicator.editor.verifyCodeFailed': '代碼檢查未通過',
+  'dashboard.indicator.editor.verifyCodeEmpty': '代碼不能為空',
   'dashboard.indicator.boundary.message': '提示：指標腳本只負責「計算 + 繪圖 + buy/sell 信號」；倉位、風控、加減倉、手續費/滑點屬於策略執行配置。',
   'dashboard.indicator.boundary.indicatorRule': "指標腳本請只輸出 buy/sell（並設定 df['buy']/df['sell']）。不要在腳本內撰寫倉位管理、止盈止損、加減倉。",
   'dashboard.indicator.boundary.backtestRule': '規則：同一根K線若出現主信號（buy/sell→開/平倉/反手），本K線將跳過所有加倉與減倉。',